Fastening.



J. L. BOGERT.

FASTENING. APPLlCATION FILED MAY.8. 1911".'l RENEWED JUNE 30.1919.

1,322,087. Patented Nov. 18, 1919.

` SWW/whoa UNITED STATES PATENT oEEroE.

JOHN LAWRENCE BOG'ERT, OF NEW YORK, N. Y., ASSIGNOR TO EDWIN H. LUDEIAN, OF NEW' YORK, N. Y.

FASTENING.

Specification of Letters etent.

Patented NOV. 18, 1919.

Application led May 8, 1917, Serial No. 167,281. Renewed June 80, 1919. Serial No. 307,779.

To all whom t may concern Be it known that I, JOHN L. BocEn'r, a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Fastenings, of which the following is a specification. ,v

This invention relates to connecting or fastening devices especially suitable or adapted for attaching two parts which are subjected to twistiuor strain. It is intended especially for use in connection with flexible shaft couplings, which may be of that type using a flexible or laminated ring which sustains in one direction the torque between coupling members, and which will bend or flex in other directions to permit angular variation of the sha-ft sections connected by the coupling. Such a coupling is shown for example in the application of Edwin H. Ludeman Serial No. 146,936 for flexible shaft coupling.

The laminated rings employed in this type of couplings have heretofore been connected to the coupling members by means of bolts, by studs on theJ members, and in various other ways. These fastening devices are subjected to a shearing action due to the power transmitted in the rotation of the shaft.

The object of the present invention is to provide au improved device for connecting such rings, for example, to the associate members.

In the accompanying drawings Figure 1 is a side elevation of a coupling employing the invention. Fig. 2 is a detail in section of the device.

Referring specifically to the drawings, 6 and 7 indicate shaft sections with a fiexible coupling between, comprising in this example heads 8 fastened to the shafts, and a laminated ring between the heads, and connected alternately thereto, as described in said application. Reference may also be made to the patent to Thomas No. 1,188,113, showing a coupling employing flexible rings.

For attaching the rings 12 to, the heads and to an intermediate member if oneV is employed, I' provide a thimble 9, consisting of a. hollow barrel with an outstanding fiange 10 at one end and a closed inner end 11 having a hole for a bolt or t-he like'13. The inner. end of this thimble fits or is seated in a corresponding recess or cavity 14 in the adjacent rigid member 8. to which it is fastened by the bolt 13. The laminations of the ring 12 have' holes through which the thiniblc extends, and a washer 15 may be interposed to space the ring from the adjacent parts.

By seating the inner end of thethimble in the body of the member or head the shearing strain is taken by the same, instead of by the attaching bolt. and the iange 1() at the end serves to confine the ring to the thimble without any additional attaching device. This provides a connecting or fastening de vico which is very effective for the purpose stated and more satisfactory than the fastening devices commonly employed. The thimlble can be made of pressed steel and the at* taching bolt. of inferior stock.

I claim:

1. In a. liexiblc coupling, the combination with a head and a flexible ring spaced therefrom, of a thimble fitting through the lie-xi ble ring and into a recess in the head, and abutting at its sides against the side wall of the recess, and means to secure the inner end of said thimble in said recess.

2. In a flexible coupling, the combinati i n with opposite' rotary heads having reces' s in the adjacent faces thereof, and a lie: f ring located between andspaced from. said heads, of thim'blcs extending through said ring and fitting;` in the recess of thc-,l` opposite heads alternately, and means tn ,tasten the thirnbles in the recesses. f

In testimony whereof, I atlix my signature in presence of two witnesses.

JOHN LAWRENCE Ill-GERT. lVitnesses:

MARIE A. Birma,

IDA DALCHER. 

